450Bushmaster.net

Al in Mi wrote:This is a 400gr .500 Winchester Platinum. They loaded it in the 500S&W and I'm pretty sure they had it in a 12ga sabot slug. I'm also pretty sure that 260gr was loaded in their 20ga sabot slug.

The jacket is copper or gliding metal and very thick. The way the jacket reverses towards the bottom will keep the core locked to the jacket almost eliminating the chance for core jacket separation.

That looks like it's going to be devastating on deer!

back in 2013 I took a 300 RUM case and cut it back to 1.800 to make legal for here in southern Michigan. a .500 bullet fits perfect, chambered a ruger 77 for it. It will push that 400gr Winchester bullet a bit over 2400fps with 300MP, and yes, it's devastating on deer or pretty much anything else in it's path.

I'll have to pick some of those 45cal bullets up and see if my guns like them.

Al in Mi wrote:Where did you find those??

Personal pick would be H110/296.

Do you fell 37 grains to be a good starting point, or is that closer to max?

I'd start at 36gr, bump 1/2gr watching for typ pressure signs.

Al in Mi wrote:I'd start at 36gr, bump 1/2gr watching for typ pressure signs.

Thanks for your help! I wasn't able to find any reloading info on this bullet and it sits between the 250gr. and 300gr. offerings that are available so it's all going to be a "guesstimate." Would you consider 40 grains a max load for this bullet?

bought some of these bullets currently working on some loads. started at 37.0 grains LilGun loaded 3 rounds had decent accuracy but a lot of soot on the case bumped up to 37.3 grains still good accuracy no pressure signs still had soot on case loaded three more 37.6 grains good accuracy case alot cleaner have not had the chance to test anymore i will probably bump up in .2 grain increments from here. hopefully get some testing done this weekend . looking very good in my rifle so far.

BIGDADDY wrote:bought some of these bullets currently working on some loads. started at 37.0 grains LilGun loaded 3 rounds had decent accuracy but a lot of soot on the case bumped up to 37.3 grains still good accuracy no pressure signs still had soot on case loaded three more 37.6 grains good accuracy case alot cleaner have not had the chance to test anymore i will probably bump up in .2 grain increments from here. hopefully get some testing done this weekend . looking very good in my rifle so far.

What rifle are you working these loads up for? I'm working on some loads for my AR with an 18" Satern barrel. I've got loads ready to shoot starting with 37 grains of H110 up to 40 grains in .5 grain increments. I functioned tested five rounds at 37 grains and there were no pressure issues, just a bit of sooting. HOWEVER, when I shot a couple of factory Hornady Black rounds right after they were also a bit sooty so I ordered a stiffer buffer spring from Sprinco. I just have to install it and find a place to sight the rifle in since the range I used to go to shut down.

BCA 18 inch upper Bushmaster lower A2 stock red sprinco buffer sping(I think) had good luck with LilGun and the 245 grain Hornadys

I could post some pictures of initial groups if I knew how to post pictures.

250 grain Hornady FTX

37.6 grains LilGun 260 grain Winchester Platinum tip bullet